How to narrow reporting for vCenter

My customer has run the colletor with the /anonymous flag (required by their security team) pointed at a single centre that manages 9 different clusters.

They want to report only on a few individual clusters - but without knowing which cluster is which (naming is anonymised) they don't know what to do.

Is it possible to dictate to the collector which cluster(s) to collect data from rather than the whole centre?

thanks
Phil